| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 48.33 | 88 |
| 2015 | 50.4 | 75 |
| 2014 | 51.68 | 70 |
| 2013 | 50.95 | 74 |
| 2012 | 51.03 | 71 |
| 2011 | 50.72 | 73 |
| 2010 | 51.55 | 67 |
| 2009 | 51.93 | 67 |
| 2008 | 51.74 | 68 |
| 2007 | 50.71 | 73 |
| 2006 | 50.55 | 70 |
| 2005 | 50.87 | 65 |
| 2004 | 48.67 | 74 |
| 2003 | 47.21 | 81 |
| 2002 | 47.3 | 82 |
| 2001 | 46.39 | 87 |
| 2000 | 45.58 | 92 |
| 1999 | 45.27 | 91 |
| 1998 | 43.95 | 94 |
| 1997 | 45.75 | 86 |
| 1996 | 45.06 | 92 |
| 1995 | 47.77 | 77 |
| 1994 | 46.74 | 77 |
| 1993 | 45.93 | 83 |
| 1992 | 45.58 | 86 |
| 1991 | 42.61 | 93 |